VoltX power transformer pvt Ltd
Windings are made from electrical grade copper and aluminum wires, strips and sheets. The process involves winding of the conductors onto fixed or collapsible formers maintaining the dimensions and insulations as per the design. Our manpower is highly skilled in making all types of windings like disc, helical, layered, crossover, sandwich and concentric
The cores are made of silicon steel which is cold rolled for orientation of grains to provide high permeability, low losses and high stacking factor. Transformer cores are built using CRGO strips of various thicknesses from 0.30 mm to 0.20 mm thickness. Our cores are built using mitered, step lap design to impart low losses and compactness.
This is a process wherein the yoke of the core is removed, and windings are placed to encircle the core limbs. While inserting the coils around the core limbs, care is taken to ensure that the sharp or pointed edges of the core strips do not damage the conductor’s insulation. Once the windings are in place, the yoke is again put in place, for completing the electrical circuit of the active part of the transformer. Windings are inserted into core leges to make this assembly followed by various electrical connections using copper cables and flats.
Presence of moisture in the active part of the transformer is detrimental to the performance and life of the transformer. Removal of moisture from the core coil assembly is a vital process. We use vapour phase drying vacuum autoclaves for removing the moisture content from the active part. Depending on the quantum of insulation material, active parts are dried from a period of 24 hours to 48 hours.
Dried core coil assemblies from the oven are lowered into the tanks for housing the active part. This process requires experienced and skilled manpower to complete the tanking process in a duration which avoids re-ingress of moisture into the active part. The HV & LV connections of the active part are brought out using bushings for external connection to the grid cables and the tank is closed airtight. This is followed by mounting other protective and monitoring accessories. Detailed process includes the following important steps.
Fully assembled jobs undergo various tests as per relevant IS / IEC standards. To maintain the transparency of our materials, workmanship and product being offered, we invariably invite customers to witness the tests to their satisfaction. Our products also undergo any special or type tests as desired by the customers. On successful completion of the FAT, we obtain the dispatch clearance from the customer and assist them in transportation to the desired location.
